DK8400311A - - Google Patents
Info
- Publication number
- DK8400311A DK8400311A DK8400311DA DK8400311A DK 8400311 A DK8400311 A DK 8400311A DK 8400311D A DK8400311D A DK 8400311DA DK 8400311 A DK8400311 A DK 8400311A
- Authority
- DK
- Denmark
- Prior art keywords
- averaging
- signals
- circuit
- stray
- computer
- Prior art date
Links
- 238000012935 Averaging Methods 0.000 abstract 6
- 238000000034 method Methods 0.000 abstract 5
- 230000000763 evoking effect Effects 0.000 abstract 2
- 230000000737 periodic effect Effects 0.000 abstract 2
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 210000004761 scalp Anatomy 0.000 abstract 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/369—Electroencephalography [EEG]
- A61B5/377—Electroencephalography [EEG] using evoked responses
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
- H04B15/005—Reducing noise, e.g. humm, from the supply
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Medical Informatics (AREA)
- Animal Behavior & Ethology (AREA)
- Physics & Mathematics (AREA)
- Psychiatry (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Veterinary Medicine (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Psychology (AREA)
- Computer Networks & Wireless Communication (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physiology (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Noise Elimination (AREA)
Abstract
An averaging method for elimination of periodic stray signals, such as stray signals originating ain an environment (2) comprising a main signal source, which method is employed in a system for measuring evoked responses during an averaging procedure run in an averaging computer (7) which processes a set of signals picked up from an examined subject (10), e.g. a human scalp, by means of electrodes (11) which set of signals is fed through an instrumentat ion amplifier (9) to an averaging computer (7). A counting circuit in the system for measuring evoked responses comprises a sensing circuit (1), a circuit (3) detecting signal half-periods, a counting circuit (5) and a triggering circuit (6), and introduces permanent desynchronization between the frequency 1/T of external stimuli signals, e.g. from a photostimulator (8), and the sweeps of the averaging procedure in the averaging computer (7) both in relation to the frequency 1/T of the periodic stray signals resulting in amplitudes of the stray signals being substantially completely eliminated.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP84100957A EP0151656B1 (en) | 1984-01-31 | 1984-01-31 | Averaging method for elimination of periodic strays and a circuit arrangement for applying the method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DK8400311A true DK8400311A (en) | 1985-07-25 |
Family
ID=8191740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK8400311D DK8400311A (en) | 1984-01-31 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4665499A (en) |
| EP (1) | EP0151656B1 (en) |
| AT (1) | ATE42032T1 (en) |
| CA (1) | CA1204871A (en) |
| DE (1) | DE3477641D1 (en) |
| DK (1) | DK8400311A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1187446B (en) * | 1985-06-18 | 1987-12-23 | Consiglio Nazionale Ricerche | DEVICE TO SEPARATE THE SIGNAL FROM NOISE AND BACKGROUND CONTRIBUTION, PARTICULARLY FOR COMPUTERIZED ELECTROCHEMICAL INSTRUMENTS |
| US5331969A (en) * | 1985-07-30 | 1994-07-26 | Swinburne Limited | Equipment for testing or measuring brain activity |
| US5199439A (en) * | 1990-01-16 | 1993-04-06 | Stanley Zimmerman | Medical statistical analyzing method |
| US5119321A (en) * | 1990-05-14 | 1992-06-02 | Harris Corporation | Adaptive threshold suppression of impulse noise |
| GB9418872D0 (en) * | 1994-09-19 | 1994-11-09 | Special Trustees For The Unite | Electrophysiological data collection system |
| AUPP354898A0 (en) | 1998-05-15 | 1998-06-11 | Swinburne Limited | Mass communication assessment system |
| AUPP354798A0 (en) | 1998-05-15 | 1998-06-11 | Swinburne Limited | Decentralised patient management system |
| US11612344B2 (en) * | 2018-11-02 | 2023-03-28 | Biocircuit Technologies, Inc. | Electrode-based systems and devices for interfacing with biological tissue and related methods |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL291827A (en) * | 1961-03-17 | |||
| FR1518881A (en) * | 1967-02-14 | 1968-03-29 | Thomson Medical | Improvements in devices and methods for the detection and summation of low amplitude signals, especially bioelectric signals |
| US3901215A (en) * | 1971-08-20 | 1975-08-26 | Erwin Roy John | Method of testing the senses and cognition of subjects |
| US4199817A (en) * | 1977-01-25 | 1980-04-22 | Conkling Laboratories | Digital averager |
| US4171696A (en) * | 1978-01-30 | 1979-10-23 | Roy John E | Prevention of distortion of brainwave data due to eye movement or other artifacts |
| US4326539A (en) * | 1978-11-28 | 1982-04-27 | Wladimir Obermajer | Process for measuring the cardiac volume |
| US4407959A (en) * | 1980-10-29 | 1983-10-04 | Fuji Electric Co., Ltd. | Blood sugar analyzing apparatus |
| US4462411A (en) * | 1981-01-07 | 1984-07-31 | The University Of Melbourne | Evoked response audiometer |
| FI63635C (en) * | 1981-06-22 | 1983-07-11 | Instrumentarium Oy | FILTRATIONSARRANGEMANG FOER ELIMINERING AV NAETSTOERNINGAR |
| US4561449A (en) * | 1982-11-30 | 1985-12-31 | Minnesota Mining And Manufacturing Company | Auditory-evoked-action-potential-measuring system |
| US4543957A (en) * | 1983-06-13 | 1985-10-01 | Ernest H. Friedman | Human response apparatus and method |
-
0
- DK DK8400311D patent/DK8400311A/da unknown
-
1984
- 1984-01-25 CA CA000446004A patent/CA1204871A/en not_active Expired
- 1984-01-31 EP EP84100957A patent/EP0151656B1/en not_active Expired
- 1984-01-31 DE DE8484100957T patent/DE3477641D1/en not_active Expired
- 1984-01-31 AT AT84100957T patent/ATE42032T1/en not_active IP Right Cessation
- 1984-02-07 US US06/577,677 patent/US4665499A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0151656A1 (en) | 1985-08-21 |
| DE3477641D1 (en) | 1989-05-18 |
| EP0151656B1 (en) | 1989-04-12 |
| US4665499A (en) | 1987-05-12 |
| ATE42032T1 (en) | 1989-04-15 |
| CA1204871A (en) | 1986-05-20 |
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